I wonder if there are an studies of people who wear hearing aids which show any cancer risk due to constant use of an electrical device within their ears? Sure

I wonder if there are an studies of people who wear hearing aids which show any cancer risk due to constant use of an electrical device within their ears? Sure it's not radio waves but it is electrical which produces magnetic flux and not oscillating like radio waves but it is EM energy. Anyway I guess in a way it's comforting that it's so hard to determine either way if long-term low power close contact EM exposure is damaging.